Valve.



1. Q. WALTON. VALVE.

v ,PPLICATION FILED SEPT. 23, l9I 0. 1,21 8,498. Patented Mar. 6, 1917.v 2 SHEETS-SHEET 1- 1. Q. WALTON.

. VALVE. APPLICATION FILED SEPT. 23. [910.

i. Q 8 w m A 1 M PA F/ JOHN Q. WALTON, OF WASHINGTON, DISTRICT OFCOLUMBIA,

VALVE.

l m...- Specification of Letters Patent.

Application filed September 23, 1910.

To all whom it may. concern:

Be it known'that 1, JOHN Q. /VALTON, a citizen of the United States,residing at lVashington, in the District of Columbia,

have invented new and useful Improvements in Valves, of which thefollowing is a specitication.

This invention relates to certain improvements in valves,- and consistsof several new features of construction and combinations of partssubstantially as hereinafter described and particularly pointed-outinthe subjoined claims. Theimprovements embodied in the present inventionare particularly but not exclusively applicable to steam stop valves andthis application of the invention, which is preferred, accordingly isshown in the accompanying drawings and will be hereinafter described indetail witl out however intending to restrict the invention, consideredin itsbroadest aspects, thereto. 1 One of the important purposes of thepresenti invention is to provide a means which will prevent the dangerof a ruptured steam connection by a water ram or hammer caused by thecareless or sudden opening of a stop valve. v

Another of the important purposes of the present invention is to providea valve which will operate automatically to cut off the flow of fluid,under pressure to the connections in the event of an accident in thelatter.

There are other purposes of the invention scription.

In accordance with the foregoing stated purposes the present'inventionembraces:

First, a stop valve comprising a main valve and an auxiliary valve,arranged be tween steam connection and a source of supply of steam tosaid connection; the auxiliary valve being provided with means foropening it manually and when so opened f establishing communication ofthe steam connection with the source of supply, so re .stricted howeverthat the steam connection fills gradually, whereby the temperature ofthe steam connection is gradually raised and the pressure in the steamconnection is caused gradually to approach the pressure in the source ofsupply; the main valve bewhich will appear from the hereinafter de- 7than that in the Patented Mar. 6, 1917. ste m. 583,448. I i

ing provided with means whereby it is automatically operated to uncoverits port in the passage between thesource of steam supply and the steamconnection when the pressure in the latter has attained one predetermined with relation to that in the source of supply, thepredetermined relative pressures at which the main valve shallautomatically open being such that the main valve is opened only whenthe pressure in the steam connection has attained a degree whichprecludes all danger water rain or hammer, such as might result in aruptured steam connection, produced when full communication offthesteamconnection with the source of steam supply is established;

SecondaA stop valve comprising-a main valve and a manually-operatedauxiliary valve arranged between a steainconnection and a source ofsupply of steam to said connection, the auxiliary valve when openedserving to establish the previously mentioned restricted communicationof the steam connection with the source. of supply and being so locatedwith relati'onj'to the steam connection and stop valve that when it hasbeen opened the steamconnection and stop valve will be thoroughlydraine'dand the tcmperatru'e thereof and pressure therein graduallyraised before the admission of steam under full pressure is permitted.

Third: A: valve arranged in the passage between a connection and asource of supply of fluid, under pressure, and having means whereby itis automatically operated under centrol of predetermined relativepressures in the connection and source of supply, the valve being held'toits seat and serving to cut off communication of the connection witht source of supply, through the port within said seat, when. thepressure in the connection is at a predetermined degree less source ofsupply, whereby, as a consequence of any sudden lowering of the pressurein theconnection,"suchas would be caused, for example, by anaccident tothe of there being a dangers to life and propert which may ex- 3 ment ofparts and in certain novel combinations of elements substantially ashereinafter described and particularly pointed out in the subjoinedclaims.

In the accompanying drawings there are illustrated several slightlydifi'erent forms of stop valves to exemplify what is now regarded as thebest embodiments of the present invention. It is to beunderstood,however, that the invention considered in its broader aspects is notrestricted to these particular embodiments and that changes may be madetherein without departing from the spirit of the invention, or the scopeof the subjoined claims. It, further,.should be understood that theparticular illustrated embodiments have several important advantagesover other means capable of carrying into practice the fundamentalpurposes of the invention hereinbe'fore particularly named, and for thisreason said particular embodiments are specifically made the subjectmatter of some of the sub'joined claims.

Tn the drawings:

Figure 1 is a view partly in elevation and partly in section of one formof stop valve embodying the present improvements, showing the parts inthe position they occupy to hold the valve against being accidentallyopened. Fig. 2 is a section on the line 2-2 of Fig. 1..

' 'Fig. 3 is a section on the line 3-3 of the same. I

Fig. at is a view similar to Fig. 1 of a slightly different form ofvalve embodying my improvements.

Fig. 5 is a similar view of another form of valve embodying the presentimprovements.

Fig. 6 is a section on the line 6-6 ofFigs. l and 5.

Fig- 7 is a detail view showing the relative position of parts whenadjusted for operation of the valve.

Fig. 8 is a detail view of a stop for supporting parts when the valve isbeing overhauled. I

Similar characters of reference denote corresponding parts in all theviews.

In all the different forms of the present valve, herein exemplified,there is a body,

marked 10, which is provided with a chamber, marked 11, having an outlet12, and an, inlet 13. This inlet is controlled by a valve, marked it,whose seat is marked 15. When this valve 14 is fully opened, the steampipes connected with the outlet 12 are thrown into full communicationwith the boiler, marked A. If this occurs when the body 10 or the steampipes are cold, or if,

through carelessness or otherwise, the valve is opened quickly, insteadof slowly and gradually, a water hammer or ram results, with consequentdanger of a ruptured steam connection, and when a ruptured steamconnection occurs the communication between said connection and thesource of steam supply must be instantaneously cut oil, to save men inthe immediate vicinity of the rupture from being scalded, andalso tosave possible dangerous boiler explosion. To eliminate all liability ofa ruptured steam connection made possible by the use 01? a valve whichcan-be fully opened or opened too widely before the steam connection isin condition safely to receive full, or approximately full, steampressure and which when so opened will permit the steam to be suppliedvided an auxiliary steam' connection from the boiler, whereby the steaminitially enters the pipes in quantity such as to cause a gradualheating thereof, and the valve 1% is maintained upon its seat until thesteam pipes have become thus heated. The valve l l is provided withmeans whereby it is then automatically opened to permit the fullpressure of the steam from the boiler to enter the steam connection. 7 V

The auxiliary steam connection hereinbefore referred to preferablycomprises a chamber or channel 16 which communicates with the chamber 11and is provided with a manually-operable valve 17 by which it may beopened and closed. As one of the important factors in the totalelimination of water hammer or ram when steam is admitted to the steamconnection the auxiliary valve 17 is so arranged that when it has beenopened any water in the steam connection and, preferably, also in thebody 10, will be automatically drained bygravity from said connectionand body while steam of small volume is being admitted thereto, thereby,further, eliminating the necessity of draining the steam connection by aseparate operation before admitting steam to the same;

The operating means for the valve 14 may comprise both a spring 18, anda differential piston 19, mounted on the valve stem 20, as shown in Fig.4t, or the dilierential piston may be omitted, as shown in Fig. 1, orthe spring may be omitted, as shown in Fig. 5; or in fact other than themeans herein illustrated, capable of holding the valve 1a to its seatuntil a predetermined pressure or temperature has been reached in thesteam connections, or of opening said valve when such predeterminedpressure or temperature h as been at tained, may be resorted to, withoutdeparting from the spirit defined by some of the hereto subioinedclaims. V I

Having thus, in a general way, set forth of the invention as some of themain or most important features of the present invention, I will nowparticularly describe the embodiments thereof illustrated to exemplifyits most satisfactory forms.

The body 10 may be suitably mounted, as shown, on a boiler A, or in anyother suitable location without departing from the spirit of theinvention. This body in the forms shown in Figs. 1 and 4 is providedwith a cover or bonnet, which extends a frame, preferably of openformation. This frame is of a length adapt ed to contain the spring 18,and preferably is composed of spaced arms 22 relatively disposed to forma yoke having a bearing 23 at its end remote from the bonnet.

Within this frame are spring abutments 24 and 25 which are relativelyadjustable to regulate the power of the spring. In the exemplifiedarrangement both abutments are adjustable. The abutment 24 is shown asprovided with a sleeve 26 which is slid ably fitted to the valve stem20. This sleeve is externally threaded and engaged by anwhich is mountedadjusting nut, marked 27,

a hand wheel 28 in the bearing 23 and has for adjusting it. longitudinalmovement, preferably by having a flange 27 which engages the inner endof the bearing 23, while its hand wheel 28 bears against the outersurface of the bearing. F or preventing rotative movement of theabutment 24 and guiding it in its reciprocatory movement, it ispreferably provided with radially-arranged arms 24 suitably engaged withthe frame. In the illustrated embodiment, the arms 22 of said frame areprovided with ribs or flanges 22 which extend longitudinally thereof andare received by recesses 24 in the arms, respectively, as shown best inFig. 3. V

The lower abutment, 25, is similarly shown as provided with radial arms,25 whose ends engage the ribs or flanges 22 and serve to guide the valvestem in its reciprocatory movement. The ribsor flanges 22 are providedwith cut away portions, marked 22, for convenience in assembling anddisassembling the parts.

It will now be seen that the spring 18 may be placed in compression bythe abutment 24 and that this compression may be variably regulated byadjustment of the abutment 24. It will also be apparent that the valveis automatically opened by the spring, when the power of the latter,added to the pressure of the steam acting on the valve in the samedirection, overcomes the force of the steam acting contrary thereto.Hence, it becomes possible so to co-relate the forces that the valvewill be maintained in closed position until the valve body has becomeheated sufiiciently to avoid a water ram or hammer, all danger of whichwill marked 21, from This nut is held against indicated in Fig. 7.

be completely avoided 'When the spring is set to open the valve when thesteam pressure in the st am connection and the body of the valve ispractically equal to that in the boiler and the pipe orconnection.

In all the illustrated embodiments of the invention, the valve stem 20is made hollow and formed to provide the hereinbefore referred tochamber or channel'l6, and the latter has communication with the chamber11 throughports 29 in said valve stem.

he auxiliary valve 17, by which communication of the chamber 11 with theboiler A is controlled, is shown as provided with a stem 30 whichextends longitudinally through the val .-'e-ste.in 20 and has ahandwheel 31 for adjusting it to and from its seat 32 formed upon thevalve 14.

The seat 15 for the valve 14 is preferably formed on a hollow member 33separate from the body 10 and threaded or otherwise removably secured tothe latter, as shown. The inlet 13 hereinbefore referred to is inthismember. A spider, marked 34, or other suitable means, preferablyintegral with the member 33, is provided as a guide for the valve-stem.20. A bushing 35 mounted on the cover or bonnet, serves as a packing andguide for the valve-stem 20 intermediate of the length of the latter. 95

Upon the valve stem 20 there is adjustably mounted a stop, marked 37, tolimit the opening movement of the main valve. This stop preferably has ahand-wheel 37 for ad-- justing it.

Attention is called to the fact that when the parts are in the positionshown in Fig. 1, the stop 37 is in. contact with the upper end of thesleeve 26. This is the position of the parts when the valve is not inuse and by reason thereof the main valve is positively fixed againstbeing opened by pressure accidentally applied to its stem. In thisposition the parts are left when a boiler associated with the stop valveis cut out of line.

As a preliminary to the operation of the valve, the hand wheel 28 isturned to withdraw the sleeve 26 from its contact with the stop 37 andto place the spring under compression. This position of the parts is Thestop 37 is next adjusted, if necessary, to determine the extent ofopening movement of the main valve 14.' In practice, it is preferred toturn the hand wheel 28 until the spring has been compressed suliicientlyto open the main valve automatically when the pressure in the main bodyof the valve and the steam connection is practically equal to that inthe boiler.

The parts having thus been set and steam pressure being on the boilerand all closed, the hand wheel 31 is turned to open the auxiliary valve17 and steam enters the chamber 16 and thence passes into the body r yeswith the sleeve 26, or

ment of the main valve.

. valve instantly will close and V ment 2 1.

'a chamber 100, here shown of the valve and the steam connection. Assoon as the pressure in the body of the valve and the steam connectionreaches the point predetermined at which the main valve 14 shall beopened, said main valve will be automatically forced from its seat thedistance determined by the stop 87 which, moving with said valve, willcome in contact some other suitable part which may be provided tocooperate with said stop to restrict the opening move- During itsmovement, said main valve is guided by the engagemen't of the arms 2tand with the webs or flanges 22 of the frame 22.

In the event that rupture of the steam connection occurs, takes placewhereby the flow of steam is suddenly increased the pressure of thesteam on the back of the main valve will overcome the compression of thespring, and the main cut the boiler out of line.

A clamp collar marked 39 is fitted to a recess turned in the valve stem20 above the guide PA, for suporting the weight of the main valve andstem when overhauling the same, and a perforated cap, marked 10-, isfitted to a threaded boss on the main valve for supporting the weight ofthe auxiliary valve 17 and its stem. under similar conditions.

If it is desired to convert this automatic safety stop valve into anordinary screw stop valve, this may be done by adjusting a stop 41,which is shown as a nut or sleeve threaded upon the stem 20 between theabutments 24 and 25, until it bears When this has been done the sleeve26 is locked betweenthe stops 37 and a1 and thereby fixed to the valvestem 20, whereby the latter may be raised or lowered by the hand wheel28, the sleeve, stops 37 and ll and the valve stem moving as a unit.

If the spring 18 weakens, the abutment 25 may be adjusted nearer to itscompanion, 24L, to compensate for such weakness.

If preferred, a differential piston may be mounted on the valve stem 20,either to supplement the spring 18, as shown in Fig. 4 or as asubstitute for said spring, as shown in Fig. 5. When this piston isemployed the valve body is formed or provided with by extending the bodyoutward beyond the plane of the outlet 12. T he pistonhere showncomprises an annulus 101 provided with radially-arranged arms 102extending thereto from a bearing 103 which preferably is threadablyengaged with the valve stem 20. This piston thus has openings throughwhich the chamber 11 at one end of the piston has communication with thespace or chamber at the other end thereof. A greater area of pistonsurface for the steam to act on in opening the valve or some otheraccident 26, nut 27, hand'wheel 28 and stop against the abutis providedby enlarging the diameter of the corresponding end thereof, as shown.Preferably, the piston is beveled toward said end to lighten its weight,as shown at 104. The outer circumferential wall of the annulus engagesthe inner wall of the piston chamber, packing rings 105 being preferablyinterposed between the two in order to make a steam-tight fit which willpermit wear to be compensated for. 106 designates a relief )ort which,in practice, may be provide with a relief cock, not shown. A part of thesteam initially admitted by the auxiliary valve 17 flows through theopenings between the arms 102 and acting upon the up per end of thepiston and againstthe beveled surfaces 10a tends to force the pistontoward its valve-opening position. This tendency, however, iscounteracted by the boiler pressure acting in the contrary direction onthe main valve and also, to a comparatively slight extent, by thepressure within the chamber 11 acting against the lower face of thepiston, until the latter pressures are overcome by the raising of thepressure within the chamber which it is intended the main open. 7

In event that the spring 18 is dispensed with, the yoke or frame can bemade materially shorter than before,such a frame being shown in Fig. 5and marked 122.

In the latter form of the device the sleeve ll, all of which are shownin Fig. 5 (as well as the abutment 25 which is not shown in said figure)also may be omitted, but it is considered preferable to employ theillustrated parts in order that the valve may be operated manually fortesting purposes, this being done by adjusting the stop 11 into contactwith the sleeve 26, as before described. It will be apparent that bymeans of the auxiliary valve the steam connections above it and also thechamber 11 may be drained as well as gradually warmed up. It will beseen that the herein exemplified embodiments of my invention are wellcalculated to cause a gradual heating of the steam connections and bodyof the stop valve, or the gradual equalization of the pressure betweensaid body and the steam connection and the boiler, before said body andconnections are subjected to full boiler pressure, and, moreover,affords provision for the preheating of the connections and valve bodyby valve shall the auxiliary connections, whether the main valve isoperated auto- 11 to that at Y matica-lly or its operating means aread-f justed for manual operation. It will also be seen that provision ismade for locking the main valve against its being accidentally opened.Further, it will be seen that provision is made for varlably determiningthe extent of the automatic opening of the main valve: and that theseseveral important features are embodied 1n a constructlon of simple,durable and practicable nature, whose (Lil parts are not liable to getout of order, may be readily assembled and relatively adjusted, andreadily disassembled for cleaning purposes and for renewals. Again, itwill be noted that while it has herein been stated that the auxiliaryvalve 17 is opened manually by turning the hand wheel 31, it is quitepracticable to open it simultaneously with the adjustment of the stop 37to determine the extent of opening of the main valve; for example, bysetting the hand wheel 31 until the shoulder 51 on the sleeve 31 thereofis in the path of the stufiing-box casing 31, which moves with the handwheel 3".

It 'will further be noted that when the primary supporting means for thevalve stem 20, which primary means are composed 01" the elements bywhich the valve stem is held. against dropping through the casing orvalve body when the parts are assembled, are removed, as they are in theoverhauling of the valve, the valve stem unless otherwise supportedwould drop into the boiler or into the steam pipe, upon either of whichit may be mounted in practice. The secondary supporting means composedof the stop 39 and the spider or support 34, in the exemplifiedembodiment, now becomes operative to support the valve stem, the latterdropping until its stop 39 rests upon the spider.

Again, it will be noted that the auxiliary valve is seated at the lowestpart of the structure whereby thorough draining of the body, and theconnections above said valve is provided for, and that the main valve islocated t the lowest part of the body and outside of the latter and inposition to enter the boiler or pipe from which the body receives itssupply of steam, whereby no steam will enter any part of the body andsaid body is relieved of steam pressure when the valves are closed.Further, it will be noted that the auxiliary valve may be moved from orto its seat wholly independently of the main valve and hence may beopened and closed at any position of the latter, or may be set to closewith the maiii valve.

Having now described the invention What I believe to benew and desire tosecure by Letters Patent. is

1. Means for controlling communication between a source of steam supplyand a steam connection, the said means comprising a main valve and anauxiliary valve, each having a stem, said valves severally controllingsuch co-nnnunication, the auxiliary '-.alve having means independent ofthe main valve stem whereby it is manually operated and being movablewith and relatively to the main valve and adapted when fully open toadmit steam to the connection in volume such as to cause a gradualincrease in the temperature of and pressure within the latter, the mainvalve being arranged to be held to its seat until a predeterminedpressure has been reached in the connection and adapted when fullyopened to admit steam under full pressure to said connection and meanshaving connection with the stem of the main valve and operable to openthe same.

2. Means for controlling communication between a source of steam supplyand a steam connection, the said a body having an inlet to the source ofsteam-supply and an outlet to the connection, a main valve and anauxiliary valve each having a! stem, said valves severally controllingcommunication between the inlet and the outlet, the auxiliary valvebeing movable with and relatively to the main valve and having meansindependent of the main valve stem whereby it is manually moved from itsseat and being adapted when fully open to admit steam to the outlet in aquantity such that the temperature of and pressure within the connectionwill be gradually raised, the main valve being subject to and held toits seat by the pressure of steam at the inlet side of the body until apredetermined pressure has been reached in the connection and adaptedwhen fully opened to admit steam under full pressure to said connection,and means having connection with the stem of the main valve forautomatically opening said valve when said predetermined pressure isreached.

8. Means for controlling communication between a source of steam supplyand a steam connection, a body having an inlet to the source ofsteam-supply and an outlet to the connection, a main valve severallycontrolling communication between the inlet and the outlet, theauxiliary valve being movable with and relatively to the main valve andhaving means whereby it is manually moved from its seat and beingadapted when fully open to admit steam to the outlet in quantity suchthat the temperature of and pressure within the connection will begradually raised, the main valve being subject to and held to its seatby the pressure of steam at the inlet side of the body until apredetermined pressure has been reached in the connection and adaptedwhen fully opened to admit steam under full pressure to said connection,and means cooperating with the pressure at the outlet side of the bodyfor automatically opening the main valve when the two pressures havereached a predetermined relation.

4. Means for controlling communication between a source of supply and aconnection, the said means comprising a main means comprising the saidmeans comprising and an auxiliary valve.

- predetermined valve, and an auxiliary valve and their seats, severallycontrolling such communication, the seats of the valves having differentareas, the port of the main valve-seat being of larger area than theauxiliary valveseat, the auxiliary valve being movable with andrelatively to the main valve and having means whereby it is manuallyoperable and means for automatically opening the main valve when thepressure in the source of supply and connection have reached apredetermined relation.

5. A stop valve comprising a body having a steam inlet and a steamoutlet, a main valve for controlling the How of steam from the inlet tothe outlet, means operable to open the main valve automatically when apressure on the outlet side of said body has been obtained, and anauxiliary means including a valve arranged to be seated upon the mainvalve and movable relatively thereto adapted to permit thispredetermined pressure to be gradually obtained.

6. A valve comprising a body having an inlet, an outlet and anintermediate chamher, a main valve for controlling the flow of fluid,under pressure, from the inlet to the outlet, said valvebeing arrangedto open in a direction opposed to that of the tlow of the fluid, meansfor adjustably regulating the amount of its opening, means operable toopen the valve automatically when a predetermined pressure on the outletside of the body has been obtained, and an auxiliary means adapted topermit this predetermined pressure to be gradually obtained, saidauxiliary means comprising a passage leading to the intermediate chamberand a. manually operable valve for controlling said passage.

7. A valve comprising a body having an inlet and an outlet, a main valvefor controlling the fiow of fluid, under pressure, from the inlet to theoutlet, said valve being arranged to open in a direction opposed to thatof the flow of the fluid, means for adjustably regulating the amount ofits opening, a spring connected with the said valve and adapted to openthe same when a predetermined pressure has been obtained on the outletside of said body, and means whereby such predetermined pressure isobtained gradually.

8. A valve comprising a body having an inlet, an outlet and anintermediate chamher, a main valve for controlling the flow of fluid,under pressure, from the inlet to the outlet, said valve being arrangedto open in a direction opposed to that of the flow of the fiuid, meansfor adiustably regulating the amount of its opening, a spring connectedwith the said valve and adapted to open the same when a predeterminedpressure has been obtained on the outlet side of said body, and meanswhereby such predeterpiston having an opening mined pressure is obtainedgradually, comprising an auxiliary channel leading to the intermediatechamber and provided with a manually-operable valve for controlling it.

9. A valve, comprising a body having an inlet and an outlet, a mainvalve for controlling the flow of fluid under pressure from the inlet tothe outlet, a differential piston and a spring connected with the saidvalve and adapted to open the. same when a predetermined pressure hasbeen obtained on the outlet side of said body, and means whereby suchpredetermined pressure is obtained, gradually.

10. A valve comprising a body having a chamber, an inlet and an outlet,a main valve controlling the how of fluid, under pressure, from theinlet to the outlet, a dift'erential piston having connection with saidvalve and mounted. in said chamber, said for the passage of fluid, underpressure, from one of its sides to the other, and being adapted to opensaid valve when a predetermined pressure has been obtained on the outletside of said body, and means whereby such predetermined pressure isobtained, gradually.

11. A. valve comprising a body having a chamber, an outlet in opencommunication with said chamber and an inlet, a main valve and anauxiliary valve and their seats, interposed between the chamber and theinlet and severally controlling the admission of fluid, under pressure,to the former, the auxiliary valve being movable with and relatively tothe main valve, the port in the seat for the auxiliary valve being ofless area than the main-valve seat port, means for opening the auxiliaryvalve manually without aii'ecting the main valve and means whereby themain valve is opened automatically when the pressure in the chamberreaches one having a predetermined relation to that at the inlet side ofthe main valve.

12. A valve comprising a body having a chamber, an outlet in opencommunication with said chamber and an inlet, a main valve and anauxiliary valve and their seats, interposed between the chamber and theinlet and severally controlling-theadmission of fluid, under pressure,to the former, the auxiliary valve being movable with and relatively tothe main valve, the port in the seat for the auxiliary valve being ofless area than the main valve-seat'port, means for opening the auxiliaryvalve manually without affecting a spring the mam valve and operativelyconnected with the' main valve and serving to open the sameautomatically when the pressure in the chamber reaches one having apredetermined relation to the pressure at the inlet side of the mainvalve.

13. A valve comprising a body having a chamber, an outlet in opencommunica tion with said chamber and an inlet, a main said valve havingvalve and an auxiliary valve and their seats, interposed between thechamber and the inlet and severally controlling the admission of fluid,under pressure, to the former, the port in the seat for the auxiliaryvalve being of less area than the port in the main valve-seat, means foropening the auxiliary valve manually without affecting the main valve, adifferential piston mounted in the chamber and a spring, said piston andspring being operatively connected to the main valve and serving to openthe same automatically when the pressure in the chamber reaches onehaving a predetermined relation to the pressure at the inlet side of themain valve.

H. A stop valve having a body provided with a steam chamber, a steamoutlet in open communication with said chamber and a steam inlet, a mainvalve interposed between the steam chamber and the inlet, a hollow stemwith a lat eral outlet port o iening into the steam chamber and an inletport toward the source of supply of steam, an auxiliary valve having itsseat adjacent to said inlet port, means independent of the main valvestem for manually opening the auxiliary valve to admit steam to theinterior of the steam chamber for preheating the body and theconnections connected to the outlet, and means for opening the mainvalve when a predetermined pressure has been attained in saidconnection.

15. A valve comprising a body having a chamber, an outlet in opencommunication with said chamber and an inlet, a main valve interposedbetween the chamber and the inlet, said valve having a hollow-stem with;a lateral outlet port opening into the chamber and also having an inletport, an auxiliary valve having its seat adjacent to the mlet port inthe main valve, means for manually opening the auxiliary valve to admitfluid, under pressure, to the interior of the chamber and means forautomatically opening the main valve when a predetermined pressure hasbeen obtained in said chamber.

16. A valve.

comprising a bodv, a reciprocatory valve, its stein, a pair ofabutments, one of said abutments being fixed on the stem and the otherslidably mounted on the stem, means connected with the slidable abutmentfor preventing rotative movement of the same on the stem, means connected with the fixed abutment for pre venting rotative movement of thestem, a spring mounted between the abutments and tending to move thevalve and stem in one direction, and means for moving the valve and stemin opposition to the spring, the latter means comprising asleeve'connected to the slidable abutment, a nut threaded upon thesleeve and held against longitudi- .through which the fluid nal movementand an adjusting device for the nut.

17. A valve, comprising a body, a reciprocatory valve, its stem, a framehaving abearing, a spring tending to open the valve, an abutment for thespring, having a sleeve slidably engaged with the stem and a partengaged with the frame, the interengaging parts of the abutment andframe be- 111g adapted to prevent rotative movement of the former, a nutmounted in said bearing and threaded upon said sleeve, an adjustingdevice for the nut, said nut being held against longitudinal movement,and a second abutment for the spring fixedly secured to the stem andprovided with a part which engages the frame and is held againstrotative movement thereby.

18. A "alve, comprising a body having an inlet and an outlet, a valvefor controlling the inlet, means operative to open said valveautomatically when a predetermined pressure has been obtained. in thebody, auxiliary means arranged to permit this predetermined pressure tobe obtained, and adjustable means for variably regulating the extent ofthe opening movement of said valve, comprising a stop adjustably mount+ed on the stem of the valve and means adjustable to engage said stop toprevent accidental opening of the valve.

19. A valve, comprising a body having an inlet for the admission offiuidunder pressure and also having an outlet for the fluid, a valve forcontrolling the inlet, a bypass of area less. than the area of the inletmay enter from the source of supply to the outlet side of the valve, aspring cooperating with the'pressure of the fluid in the body to openthe valve automatically when the latter pres-- sure has attainedpredetermined relation to that of the source of supply, abutments forthe spring, one of said abutments being connected with the valve, asleeve connected with the other abutment, and means for adjusting thesleeve to put stress on the spring.

20. A valve, comprising a body having an inlet and an outlet, a valvefor controlling the inlet, a valve stem, a spring, abutments for thespring, one of said abutments being connected with the valve stem andthe other adjustably mounted with relation thereto and having a sleeve,and a stop on the valve stem adapted to be engaged by the sleeve, saidsleeve being adjustable to a place where it cooperates with said stop toprevent any seat and from said place to put stress the spring, and saidrelatively to the stem 21, A valve, comprising a body having an inletand an outlet, a valve subjected to fluid pressure tending to hold it toits seat,

on stop being adjustable and sleeve.

movement of the valve from its admit fluid, under pressure,

means operative to between a source of supply of fluid, under pressure,and a connection, the said means comprising a'valve having an inlet forconnection with said source of supply and an outlet to the connection, amain valve for controlling the inlet, means controllable to to theoutlet side of the main valve in volume adapted to raise the pressure inthe body of the stop valve gradually and means for opening the mainvalve automatically when the pressure in the body of the valve hasattained a predetermined relation to that in the source of V supply, thelatter means comprising a spring having connection with the main valve,and means adjustable to put variable stress on said spring.

23. Means for between a source of supply pressure, and a connection,

controlling communication of fluid, under the sa1d means comprising avalve having an inlet for connection with said source of supply and anoutlet to the connection, a main valve for controlling the inlet, meanscontrollable to admit fluid, under pressure, to the outlet side of themain valve in volume adapted to raise the pressure in the body of thevalve gradually and means for opening the main valve automatically whenthe pressure in the body of the valve has attained a predeterminedrelation to that in the source of supply, the latter means comprising aspring having connection with the main valve, means adjustable to putvariable stress on said spring, and a stop movable with the main valve,said stop and means being so correlated that they are adapted cooperatively to prevent movement of the main valve from its seatwhenrelatively adjusted to a certain position.

24. A valve comprising a body having an inlet and an outlet, a valve,means operative to open said valve automatically when a predeterminedpressure has been obtained in the outlet, means through which saidpressure can be obtained, and adjustable means for rendering theautomatic means inoperative or operative, at will without interferingwith the operation of the main valve.

25. A valve comprising a body having an inlet and an. outlet, a valve,means operated to open said valve automatically when a predeterminedpressure has been obtained in the body, means through which saidpressure can be obtained, adjustable means for rendering the automaticmeans inoperative and a manually operable means for adjusting the valvewhen the automatic means are inoperative.

26. A valve, comprising a body, having an inlet and an outlet, a valve,its stem, means operative to open said valve automatically when apredetermined pressure has been obtained in the body, means throughwhich said pressure can be obtained, a hand wheel, a sleeve slidablymounted on the valve stem, means whereby the hand wheel is preventedfrom moving longitudinally and has threaded engagement with the sleeve,lock the sleeve to and release it from said stem.

27. A valve, comprising a body having an inlet and an outlet, a valve,its stem, a spring operative to open said valve automatically when apredetermined pressure has been obtained in the body, means throughwhich said pressure can be obtained, a hand wheel, a sleeve slidablymounted on the valve-stem and having means whereby it puts stress on thespring, means whereby the hand wheel is prevented from movinglongitudinally and has threaded engagement with the sleeve for adjustingthe latter, and means adapted to lock the sleeve to and release it fromsaid stem.

28. A. valve comprising a body having an inlet and an outlet, a valve,its stem, means connected with said stem .for opening the valveautomatically when a predetermined pressure has been obtained in thebody, means through which said pressure can be obtained, a hand wheel, asleeve slidably mounted on the valve-stem, a stop mounted on the stem atone end otthe sleeve, a stop adjustably mounted on the stem at the otherend of the sleeve, said stops being adapted to clamp the sleeve betweenthem, and means whereby the hand wheel is prevented from movinglongitudinally and has threaded engagement with the sleeve.

29. A valve, comprising a body having an inlet and an outlet, a mainvalve, means operable to open the main valve automatically when apredetermined pressure in said body has been obtained, an auxiliaryvalve adapted to permit this pressure to be obtained gradually,adjustable means for determining the extent of opening movement of themain valve and means whereby the auxiliary valve is opened by adjustmentof saidadjustable means.

30. A stop valve, comprising a body having a steam inlet and a steamoutlet, main and auxiliary valves, the main valv having a port whichopens directly into the body near the steam inlet and through whichsteam is admitted in quantity adapted to heat the body and steamconnection gradually, and the auxiliary valve being seated in the mainvalve and controlling said port, said main valve having a hollow stemand and means adapted to I closing said inlet,

the auxiliary valve being provided with a stem extending through thestem of the main valve and means applied to each stem for operating thevalves independently of each other.

31. A stop valve, comprising a body having a steam inlet and a steamoutlet, main and auxiliary valves, the main valve having a port whichopens directly into the body near the steam inlet and through whichsteam is admitted in quantity adapted to heat the body and steamconnection gradually, and the auxiliary valve being seated in the mainvalve and controlling said port, said main valve having a hollow stemand the auxiliary valve being provided with a stem extending through thestem of the main valve, a hand wheel mounted on the stem of theauxiliary valve outside the stem of the main valve and means applied tothe stem of the main valve whereby the same may be opened manually.

32. A stop valve, comprising a body having a steam inlet and a steamoutlet, main and auxiliary valves, the main valve having a port which isin communication with the steam outlet and through which steam isadmitted in quantity adapted to heat the body and steam connectiongradually, and the auxiliary valve being seated in the main valve andcontrolling said port, said main 'va-lve having a hollow stem and theauxiliary valve being provided with a stem extending through the stem ofthe main valve, a hand wheel mounted on the stem of the auxiliary valveoutside the stem of the main valve and means whereby the main valve isopened automatically when a predetermined pressure of steam has beenobtained in the body.

33. A stop steam valve comprising a body having a steam inlet at itslowest part and also having a steam outlet, a main valve for said mainvalve being provided with an inlet port which is in open communicationwith the steam outlet when said port is uncovered, and an auxiliaryvalve for said port, the auxiliary valve being movable relatively to.the mam valve, whereby the body is thoroughly drained and steam incomparatively small volume is admitted to the outlet when the auxiliaryvalve is opened.

Copies of this patent may be obtained for five cents each, by addressingthe 34. A stop valve comprising a body having a steam inlet at itslowest part and also having a steam outlet, a main valve for closingsaid inlet, said main valve being provided with an inlet port which isin open communication with the steam outlet when said port is uncovered,and an auxiliary valve for said port, the auxiliary valve being movablerelatively to the main valve, whereby the body is thoroughly drained,and steam in comparatively small volume is admitted to the outlet whenthe auxiliary Valve is opened and means for automatically opening themain valve when the pressure of steam admitted through the port in themain valve attains a predetermined relationship with that On the outerside of the main valve.

85. In combination with a steam boiler, a stop valve comprising a bodymounted on said boiler and having an inlet port, a downwardly-openingvalve for controlling said port, located outside said body in positionto enter the boiler, an auxiliary inlet port, an auxiliary valve forclosing the latter port, means for manually operating the auxiliaryvalve, the valve body also having a steam outlet and a passage throughwhich the auxiliary and communication with its said outlet, and meanswhereby the main valve is automatically opened and closed under controlof pradetermined variations in pressures in the 36. A valve comprising abody having an inlet and an outlet, a main valve for con trolling theflow of fluid under pressure from the inlet to the outlet, meansoperable to open the main valve automatically when a predeterminedpressure on the outlet side of the body has been obtained, and anauxiliary means including a valve arranged to be seated upon the mainvalve and movable relatively thereto adapted to permit thispredetermined pressure to be gradually obtained.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOHN Q. WALTON. Witnesses:

C. J. STOCKMAN, A. STOCKMAN.

Commissioner of Patents,

Washington, D. 0.

main inlet ports have

